Airmail box



FIG. 1 is a front perspective view of the airmail box showing the new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a left-side elevation view thereof; and,

FIG. 7 is a right-side elevation view thereof.

The broken lines shown in the drawings depict portions of the airmail box that form no part of the claimed design. 

CLAIM The ornamental design for an airmail box, as shown and described. 